Part of T9507 to cleanly include libtirpc support (libtirpc support is not available in autotools)
Matches the functionality of the autotools built version.
- kdrive options are enabled by xephyr=true.
- no longer links against systemd but re-login via sddm works ok.
- udev-kms currently does nothing but udev and udev-kms have spilt in master so keep enabled to avoid surprises in the future.